Traditional Culture Encyclopedia - Traditional culture - How are digital photos imaged?
How are digital photos imaged?
I don't know much about it either. I'll give you an answer casually.
(1) When shooting a scene with a digital camera, the light reflected from the scene is transmitted to the CcD through the lens of the digital camera.
(2) When the CCD is exposed to light, the photodiode is excited by light, releasing charges and generating electrical signals of photosensitive elements.
(The CCD control chip uses the control signal circuit in the photosensitive element to control the current generated by the light-emitting diode, which is output by the current transmission circuit. The CCD will collect the electrical signal generated by one imaging and output it to the amplifier.
(4) The amplified and filtered electrical signals are transmitted to ADC, which converts the electrical signals (analog signals) into digital signals. The magnitude of numerical values and the intensity of electrical signals are directly proportional to the voltage, and these numerical values are actually image data.
(5) At this time, these image data can not directly generate images, but should be output to DSP (Digital Signal Processor). In DSP, these image data will be processed by color correction and white balance, and encoded into image formats and resolutions supported by digital cameras, and then stored as image files.
(6) When the above steps are completed, the image file will be saved in the memory, and we can enjoy it.
Worried about the quality of the developed photos? Just go to an old shop. I have a home-cooked restaurant. I'll introduce you if necessary.
Eternal printing, focusing on this line for almost 20 years, the printing quality is the best in my opinion, and the photos are kept for a long time.
They also do online printing recently. You can search for Eternal Print on Baidu or Taobao.
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